Interactive display system

Details Interactive display system Interactive display system

1991-05-10

1992-06-30

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

178 18, 340709, 307907, G08C 2100

Patent

active

051265133

ABSTRACT:
In an interactive display system, a transmitter is provided for transmitting a periodic signal to a plurality of receivers through the air. One or more phase differences are measured between the receiving at pairs of receivers. These phase differences control the coordinates of a locator on a display screen. Separate measured phase differences control the positions along different coordinate axes independently.

REFERENCES:
patent: 4758691 (1988-07-01), De Brugne
patent: 4885433 (1989-12-01), Schier
patent: 4910363 (1990-03-01), Kobayashi et al.

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